Kistler Instruments Ltd. - PRODUCT NEWS
Kistler Process Monitoring Systems for Zero Reject Clinching and Riveting.
The use of cold forming processes, such as clinching and riveting, are replacing welding in the manufacture of an increasing number of sheet metal assemblies. Although used for many years, it is only recently that a real understanding of the forces needed for reliable plastic deformation of metals has made cold forming acceptable in the manufacture of quality components including car doors, bonnets and tailgates in both aluminium and steel.
To eliminate faulty joins, Kistler (www.kistler.com) has introduced systems using piezoelectric sensors to monitor the processes off-line and on-line.
On-line Monitoring of the force needed for plastic deformation during the clinching process can detect wear in the clinching tool, punch or swage breakage, deviations in the dimensions or number of parts and incorrect machine setting. Continuous monitoring makes the clinching cycle transparent for QA recording and identifies any long-term changes in machine performance.
Off-line checking of the clinching tongs using a Kistler hand-held calibration transmitter can be used to monitor and, if necessary, adjust the on-line system sensors.
A similar method can be applied to monitor pop and blind riveting machines to eliminate faults in the process.
Data from the monitoring sensors can be fed to a central production control system or processed locally using Kistler CoMo Net or CoMo View process monitoring systems. Both systems can provide a signal to activate a faulty unit rejection mechanism.
Force monitoring of clinching and riveting processes eliminates faulty components from the production output to ensure a consistently high product quality. As the need for manual QA inspection is minimised, overall productivity is enhanced and costs minimised.
Kistler Instruments Limited
Established in Wintherthur (Switzerland) in 1957, Kistler is represented in over 50 countries and has subsidiaries in Germany, France, Italy, UK, Japan, USA, China, Korea and Singapore. With a staff of more than 800, the Kistler Group is one of the world's leading providers of dynamic measuring instrumentation. The Kistler Group achieved turnover of 160 million Swiss Francs in the 2005 financial year.
Kistler's core competence is the development, production and use of sensors for measuring pressure, force and acceleration. Kistler's know-how and electronic systems can be used to prepare measuring signals for use in analyzing physical processes, controlling and optimizing industrial processes, improving product quality in manufacturing and improving performance in sports and rehabilitation.
Kistler offers a comprehensive range of sensors and systems for engine development, automotive engineering, plastics and metal processing, installation technology and biomechanics.
Heavy investment in research and development, 15% of staff worldwide are engaged in research and development, has generated a number of innovations using piezoelectric, piezoresistive and capacitive techniques to provide solutions to numerous force, pressure and acceleration measuring problems. These innovations include the world's first commercial quartz sensor, two-wire constant current technology to integrate sensors with microelectronic circuitry, high-temperature pressure sensors for use up to 400 Deg C and three-component force measuring sensors.
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